Answer to: After glass/screen replacement - NO SOUNDDid you check all the connections?
Answer to: Digitizer only responding to bottom half of screenThe cables are the very easy to damage. However, I would think that if you had damaged the connector cable, the digitizer screen wouldn't work at all. I had to replace the digitizer screen on my iPad. Got one from http://ipad.screentekinc.com- and it works just fine.